Password Strength Checker

How to use

1. 1. Enter or paste your data in the input area above
2. 2. Adjust settings or options as needed
3. 3. Click the action button or see real-time results
4. 4. Copy the result with the copy button

All processing happens in your browser. Nothing is sent to any server.

About this tool

Check password strength with a comprehensive analysis covering length, character diversity, entropy calculation, common password detection, sequential pattern detection, and repeating character detection. The tool calculates entropy in bits based on the character set size and password length, estimates crack time against modern GPU attacks (assuming 10 billion hashes per second), and checks against a list of the most common passwords. Results include a visual strength meter, individual pass/fail checks for 9 criteria, and the estimated time to crack. All analysis happens in your browser — your password is never transmitted or stored. Use it alongside our Password Generator to create and verify strong passwords.

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